'rum CaPTING TELEGRAPH.
13alrewell's copying electric telegraph was successfully tried be- tween London and lnghtcrn on"Wednesday, with :the wires of the Elec- tric Telegraph Company. Ban-similes of written messages were trans- mitted from .Brighton to London at the rate of 140 letters .per-minute.; 'hough this:iestated tole notnearly so rapid asmessages might be-trans- mitted by this telegraph when in :regular .:work. One of the advantages which this mode -of telegmplic correspondence presents is freedom from error. Tho process is performed by very simple mechanism ; conse- quently the liability to mistakes arising from inaccurate manipulation is avoided ; and the communications received -being copies of the original writing, illegible, must be correct. In the course of the-experiments on Wednesday, the peculiar method of observing secrecy which the copying telegraph possesses was tried : a message was impressed on paper so pre- pared that the writing was invisible until washed with a solution -that instantly rendered it distinctly readable.
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